
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
  "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" lang="en">
  <head>
    <meta http-equiv="X-UA-Compatible" content="IE=Edge" />
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <title>Database migration operations &#8212; Django 2.2.12.dev20200304094918 documentation</title>
    <link rel="stylesheet" href="../../../_static/default.css" type="text/css" />
    <link rel="stylesheet" href="../../../_static/pygments.css" type="text/css" />
    <script type="text/javascript" id="documentation_options" data-url_root="../../../" src="../../../_static/documentation_options.js"></script>
    <script type="text/javascript" src="../../../_static/jquery.js"></script>
    <script type="text/javascript" src="../../../_static/underscore.js"></script>
    <script type="text/javascript" src="../../../_static/doctools.js"></script>
    <script type="text/javascript" src="../../../_static/language_data.js"></script>
    <link rel="index" title="Index" href="../../../genindex.html" />
    <link rel="search" title="Search" href="../../../search.html" />
    <link rel="next" title="Full text search" href="search.html" />
    <link rel="prev" title="PostgreSQL specific lookups" href="lookups.html" />



 
<script type="text/javascript" src="../../../templatebuiltins.js"></script>
<script type="text/javascript">
(function($) {
    if (!django_template_builtins) {
       // templatebuiltins.js missing, do nothing.
       return;
    }
    $(document).ready(function() {
        // Hyperlink Django template tags and filters
        var base = "../../templates/builtins.html";
        if (base == "#") {
            // Special case for builtins.html itself
            base = "";
        }
        // Tags are keywords, class '.k'
        $("div.highlight\\-html\\+django span.k").each(function(i, elem) {
             var tagname = $(elem).text();
             if ($.inArray(tagname, django_template_builtins.ttags) != -1) {
                 var fragment = tagname.replace(/_/, '-');
                 $(elem).html("<a href='" + base + "#" + fragment + "'>" + tagname + "</a>");
             }
        });
        // Filters are functions, class '.nf'
        $("div.highlight\\-html\\+django span.nf").each(function(i, elem) {
             var filtername = $(elem).text();
             if ($.inArray(filtername, django_template_builtins.tfilters) != -1) {
                 var fragment = filtername.replace(/_/, '-');
                 $(elem).html("<a href='" + base + "#" + fragment + "'>" + filtername + "</a>");
             }
        });
    });
})(jQuery);</script>

  </head><body>

    <div class="document">
  <div id="custom-doc" class="yui-t6">
    <div id="hd">
      <h1><a href="../../../index.html">Django 2.2.12.dev20200304094918 documentation</a></h1>
      <div id="global-nav">
        <a title="Home page" href="../../../index.html">Home</a>  |
        <a title="Table of contents" href="../../../contents.html">Table of contents</a>  |
        <a title="Global index" href="../../../genindex.html">Index</a>  |
        <a title="Module index" href="../../../py-modindex.html">Modules</a>
      </div>
      <div class="nav">
    &laquo; <a href="lookups.html" title="PostgreSQL specific lookups">previous</a>
     |
    <a href="../../index.html" title="API Reference" accesskey="U">up</a>
   |
    <a href="search.html" title="Full text search">next</a> &raquo;</div>
    </div>

    <div id="bd">
      <div id="yui-main">
        <div class="yui-b">
          <div class="yui-g" id="ref-contrib-postgres-operations">
            
  <div class="section" id="s-database-migration-operations">
<span id="database-migration-operations"></span><h1>Database migration operations<a class="headerlink" href="#database-migration-operations" title="Permalink to this headline">¶</a></h1>
<p>All of these <a class="reference internal" href="../../migration-operations.html"><span class="doc">operations</span></a> are available from
the <code class="docutils literal notranslate"><span class="pre">django.contrib.postgres.operations</span></code> module.</p>
<div class="section" id="s-creating-extension-using-migrations">
<span id="s-create-postgresql-extensions"></span><span id="creating-extension-using-migrations"></span><span id="create-postgresql-extensions"></span><h2>Creating extension using migrations<a class="headerlink" href="#creating-extension-using-migrations" title="Permalink to this headline">¶</a></h2>
<p>You can create a PostgreSQL extension in your database using a migration file.
This example creates an hstore extension, but the same principles apply for
other extensions.</p>
<p>Set up the hstore extension in PostgreSQL before the first <code class="docutils literal notranslate"><span class="pre">CreateModel</span></code>
or <code class="docutils literal notranslate"><span class="pre">AddField</span></code> operation that involves
<a class="reference internal" href="fields.html#django.contrib.postgres.fields.HStoreField" title="django.contrib.postgres.fields.HStoreField"><code class="xref py py-class docutils literal notranslate"><span class="pre">HStoreField</span></code></a> by adding a migration with
the <a class="reference internal" href="#django.contrib.postgres.operations.HStoreExtension" title="django.contrib.postgres.operations.HStoreExtension"><code class="xref py py-class docutils literal notranslate"><span class="pre">HStoreExtension</span></code></a> operation.
For example:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="kn">from</span> <span class="nn">django.contrib.postgres.operations</span> <span class="k">import</span> <span class="n">HStoreExtension</span>

<span class="k">class</span> <span class="nc">Migration</span><span class="p">(</span><span class="n">migrations</span><span class="o">.</span><span class="n">Migration</span><span class="p">):</span>
    <span class="o">...</span>

    <span class="n">operations</span> <span class="o">=</span> <span class="p">[</span>
        <span class="n">HStoreExtension</span><span class="p">(),</span>
        <span class="o">...</span>
    <span class="p">]</span>
</pre></div>
</div>
<p>Creating the extension requires a database user with superuser privileges.
If the Django database user doesn’t have superuser privileges, you’ll have
to create the extension outside of Django migrations with a user that has
the appropriate privileges. In that case, connect to your Django database and
run the query <code class="docutils literal notranslate"><span class="pre">CREATE</span> <span class="pre">EXTENSION</span> <span class="pre">IF</span> <span class="pre">NOT</span> <span class="pre">EXISTS</span> <span class="pre">hstore;</span></code>.</p>
</div>
<div class="section" id="s-createextension">
<span id="createextension"></span><h2><code class="docutils literal notranslate"><span class="pre">CreateExtension</span></code><a class="headerlink" href="#createextension" title="Permalink to this headline">¶</a></h2>
<dl class="class">
<dt id="django.contrib.postgres.operations.CreateExtension">
<em class="property">class </em><code class="descname">CreateExtension</code>(<em>name</em>)<a class="reference internal" href="../../../_modules/django/contrib/postgres/operations.html#CreateExtension"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#django.contrib.postgres.operations.CreateExtension" title="Permalink to this definition">¶</a></dt>
<dd><p>An <code class="docutils literal notranslate"><span class="pre">Operation</span></code> subclass which installs PostgreSQL extensions.</p>
<dl class="attribute">
<dt id="django.contrib.postgres.operations.CreateExtension.name">
<code class="descname">name</code><a class="headerlink" href="#django.contrib.postgres.operations.CreateExtension.name" title="Permalink to this definition">¶</a></dt>
<dd><p>This is a required argument. The name of the extension to be installed.</p>
</dd></dl>

</dd></dl>

</div>
<div class="section" id="s-btreeginextension">
<span id="btreeginextension"></span><h2><code class="docutils literal notranslate"><span class="pre">BtreeGinExtension</span></code><a class="headerlink" href="#btreeginextension" title="Permalink to this headline">¶</a></h2>
<dl class="class">
<dt id="django.contrib.postgres.operations.BtreeGinExtension">
<em class="property">class </em><code class="descname">BtreeGinExtension</code><a class="reference internal" href="../../../_modules/django/contrib/postgres/operations.html#BtreeGinExtension"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#django.contrib.postgres.operations.BtreeGinExtension" title="Permalink to this definition">¶</a></dt>
<dd><p>Install the <code class="docutils literal notranslate"><span class="pre">btree_gin</span></code> extension.</p>
</dd></dl>

</div>
<div class="section" id="s-btreegistextension">
<span id="btreegistextension"></span><h2><code class="docutils literal notranslate"><span class="pre">BtreeGistExtension</span></code><a class="headerlink" href="#btreegistextension" title="Permalink to this headline">¶</a></h2>
<dl class="class">
<dt id="django.contrib.postgres.operations.BtreeGistExtension">
<em class="property">class </em><code class="descname">BtreeGistExtension</code><a class="reference internal" href="../../../_modules/django/contrib/postgres/operations.html#BtreeGistExtension"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#django.contrib.postgres.operations.BtreeGistExtension" title="Permalink to this definition">¶</a></dt>
<dd><p>Install the <code class="docutils literal notranslate"><span class="pre">btree_gist</span></code> extension.</p>
</dd></dl>

</div>
<div class="section" id="s-citextextension">
<span id="citextextension"></span><h2><code class="docutils literal notranslate"><span class="pre">CITextExtension</span></code><a class="headerlink" href="#citextextension" title="Permalink to this headline">¶</a></h2>
<dl class="class">
<dt id="django.contrib.postgres.operations.CITextExtension">
<em class="property">class </em><code class="descname">CITextExtension</code><a class="reference internal" href="../../../_modules/django/contrib/postgres/operations.html#CITextExtension"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#django.contrib.postgres.operations.CITextExtension" title="Permalink to this definition">¶</a></dt>
<dd><p>Installs the <code class="docutils literal notranslate"><span class="pre">citext</span></code> extension.</p>
</dd></dl>

</div>
<div class="section" id="s-cryptoextension">
<span id="cryptoextension"></span><h2><code class="docutils literal notranslate"><span class="pre">CryptoExtension</span></code><a class="headerlink" href="#cryptoextension" title="Permalink to this headline">¶</a></h2>
<dl class="class">
<dt id="django.contrib.postgres.operations.CryptoExtension">
<em class="property">class </em><code class="descname">CryptoExtension</code><a class="reference internal" href="../../../_modules/django/contrib/postgres/operations.html#CryptoExtension"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#django.contrib.postgres.operations.CryptoExtension" title="Permalink to this definition">¶</a></dt>
<dd><p>Installs the <code class="docutils literal notranslate"><span class="pre">pgcrypto</span></code> extension.</p>
</dd></dl>

</div>
<div class="section" id="s-hstoreextension">
<span id="hstoreextension"></span><h2><code class="docutils literal notranslate"><span class="pre">HStoreExtension</span></code><a class="headerlink" href="#hstoreextension" title="Permalink to this headline">¶</a></h2>
<dl class="class">
<dt id="django.contrib.postgres.operations.HStoreExtension">
<em class="property">class </em><code class="descname">HStoreExtension</code><a class="reference internal" href="../../../_modules/django/contrib/postgres/operations.html#HStoreExtension"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#django.contrib.postgres.operations.HStoreExtension" title="Permalink to this definition">¶</a></dt>
<dd><p>Installs the <code class="docutils literal notranslate"><span class="pre">hstore</span></code> extension and also sets up the connection to
interpret hstore data for possible use in subsequent migrations.</p>
</dd></dl>

</div>
<div class="section" id="s-trigramextension">
<span id="trigramextension"></span><h2><code class="docutils literal notranslate"><span class="pre">TrigramExtension</span></code><a class="headerlink" href="#trigramextension" title="Permalink to this headline">¶</a></h2>
<dl class="class">
<dt id="django.contrib.postgres.operations.TrigramExtension">
<em class="property">class </em><code class="descname">TrigramExtension</code><a class="reference internal" href="../../../_modules/django/contrib/postgres/operations.html#TrigramExtension"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#django.contrib.postgres.operations.TrigramExtension" title="Permalink to this definition">¶</a></dt>
<dd><p>Installs the <code class="docutils literal notranslate"><span class="pre">pg_trgm</span></code> extension.</p>
</dd></dl>

</div>
<div class="section" id="s-unaccentextension">
<span id="unaccentextension"></span><h2><code class="docutils literal notranslate"><span class="pre">UnaccentExtension</span></code><a class="headerlink" href="#unaccentextension" title="Permalink to this headline">¶</a></h2>
<dl class="class">
<dt id="django.contrib.postgres.operations.UnaccentExtension">
<em class="property">class </em><code class="descname">UnaccentExtension</code><a class="reference internal" href="../../../_modules/django/contrib/postgres/operations.html#UnaccentExtension"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#django.contrib.postgres.operations.UnaccentExtension" title="Permalink to this definition">¶</a></dt>
<dd><p>Installs the <code class="docutils literal notranslate"><span class="pre">unaccent</span></code> extension.</p>
</dd></dl>

</div>
</div>


          </div>
        </div>
      </div>
      
        
          <div class="yui-b" id="sidebar">
            
      <div class="sphinxsidebar" role="navigation" aria-label="main navigation">
        <div class="sphinxsidebarwrapper">
  <h3><a href="../../../contents.html">Table of Contents</a></h3>
  <ul>
<li><a class="reference internal" href="#">Database migration operations</a><ul>
<li><a class="reference internal" href="#creating-extension-using-migrations">Creating extension using migrations</a></li>
<li><a class="reference internal" href="#createextension"><code class="docutils literal notranslate"><span class="pre">CreateExtension</span></code></a></li>
<li><a class="reference internal" href="#btreeginextension"><code class="docutils literal notranslate"><span class="pre">BtreeGinExtension</span></code></a></li>
<li><a class="reference internal" href="#btreegistextension"><code class="docutils literal notranslate"><span class="pre">BtreeGistExtension</span></code></a></li>
<li><a class="reference internal" href="#citextextension"><code class="docutils literal notranslate"><span class="pre">CITextExtension</span></code></a></li>
<li><a class="reference internal" href="#cryptoextension"><code class="docutils literal notranslate"><span class="pre">CryptoExtension</span></code></a></li>
<li><a class="reference internal" href="#hstoreextension"><code class="docutils literal notranslate"><span class="pre">HStoreExtension</span></code></a></li>
<li><a class="reference internal" href="#trigramextension"><code class="docutils literal notranslate"><span class="pre">TrigramExtension</span></code></a></li>
<li><a class="reference internal" href="#unaccentextension"><code class="docutils literal notranslate"><span class="pre">UnaccentExtension</span></code></a></li>
</ul>
</li>
</ul>

  <h4>Previous topic</h4>
  <p class="topless"><a href="lookups.html"
                        title="previous chapter">PostgreSQL specific lookups</a></p>
  <h4>Next topic</h4>
  <p class="topless"><a href="search.html"
                        title="next chapter">Full text search</a></p>
  <div role="note" aria-label="source link">
    <h3>This Page</h3>
    <ul class="this-page-menu">
      <li><a href="../../../_sources/ref/contrib/postgres/operations.txt"
            rel="nofollow">Show Source</a></li>
    </ul>
   </div>
<div id="searchbox" style="display: none" role="search">
  <h3>Quick search</h3>
    <div class="searchformwrapper">
    <form class="search" action="../../../search.html" method="get">
      <input type="text" name="q" />
      <input type="submit" value="Go" />
      <input type="hidden" name="check_keywords" value="yes" />
      <input type="hidden" name="area" value="default" />
    </form>
    </div>
</div>
<script type="text/javascript">$('#searchbox').show(0);</script>
        </div>
      </div>
              <h3>Last update:</h3>
              <p class="topless">Mar 04, 2020</p>
          </div>
        
      
    </div>

    <div id="ft">
      <div class="nav">
    &laquo; <a href="lookups.html" title="PostgreSQL specific lookups">previous</a>
     |
    <a href="../../index.html" title="API Reference" accesskey="U">up</a>
   |
    <a href="search.html" title="Full text search">next</a> &raquo;</div>
    </div>
  </div>

      <div class="clearer"></div>
    </div>
  </body>
</html>